Dental syringe



May 20 1924.

' B. F. sAHR DENTAL SYRINGE Fila peo. 51. 192s .2 sheets-snee'. 1

Miay'zmm.

B FSAHR DENTAL 57i-'RINGE 2 Sheets-5heet 2' Filed Dec s1. 1923 MM/ IPatented May ze, 1924.

UNITEDSTATES BENJAMIN F. sans, onHUToHINsoN; MINNESOTA.,

- vDENTAL SYRINGE.

Application led December 31, 1923. Serial No. 68,534.

To all whom t may concern.'

Be it known that I, BENJAMIN F. SAHR, a citizen of the United' atates,residingv at Hutchinson, in the county/of McLeod and State of Minnesota,have invented certain new and useful Improvements in Dental Syringes;and I do hereby declare the following to be a full, clear, and exactdescription yof the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention provides an improved dental syringe designed and adapted toeiiiciently wash out the interdental spaces between the teeth and gums,and, generally stated, the'inventionconsists of the novel constructionand arrangement hereinafter described and defined in the claims. j

To all dentists, and other persons familiar with the subject, it iswelllrnown that, between the teeth'o'f'human beings, there arelinterdental spaces, which, becaus'eof the divergence of the adjacentteeth and the formation of the gums between the teeth, are of a formthat might be well designated either as V-shaped or Y-shaped, but which,for convenience of statement, will be hereinafter designated asV-shaped. In practice, it has been found that an ordinary syringe havingthe customary round or substantially round orifice will not efectuallyclean or wash out these interdental spaces. My invention is directed inparticular to the formation of the discharge end of the nozzle and ofthe discharge orifice of the nozzle. l

Inasmuch as there is a decideddivergence of the adjacent teeth from theinterdental spaces, I provide the nozzle with a discharge end withreversely beveled and perferably concavely curved tooth-engagingsurfaces that make the end of the nozzle substantially wedge-shaped; andI provide the said nozzle with a main discharge orifice formed withattenuated diverging extension channels that aiord a substantiallyV-shaped dischargeorifice at the discharge/end of the nozzle. Thisapproximately V-shaped discharge orifice will correspond approximatelyto the average V-shaped form of the interdental spaces, and this resultis best accomplished by making the attenuated channel extensionsslightly curved.

In the accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings Fig. l is a side elevation showing theimproved dental syringe;

Fig. 2 is an enlarged section en the line 2-2 of Fig. l; i

Fig. 3 is an enlarged transverse section taken through the nozzle on theline 3`3 of Fig.l; 'i f` Fig. 4 is a plan'view ofthe nozzle, the stembeing broken away, portions of two adjacent teeth being indicatedminlhorizontal sections;

Fig. 5 is a view in elevation showing a row of teeth and showingthenozzle. insection on the line 5--5 of Fig. 4; and

Fig. 6 is a perspective viewshowing a marginal soft rubber capfor'application to the end of the nozzle.

The teeth are indicated by the' characterl a, .the gums by theAcharacter o, and the V- lshaped interdental'spaces 'by thefcharacter o.

The syringe illustrated lis of thetypel coinprising a tubular stem `6and a 4bulb 7 The tubular stem'6 terminates in"V a"'"dischar'ge nozzle 8shown as formed integral therewith but expanded and increased in crosssection, so that its main channel 9 is provided with attenuateddiverging extension channels or wings 10, preferably slightly curved. Byreference particularly to Figs. 3 and 5, it will be noted that, in crosssection, the nozzle isapproximately Y-shaped. By reference to Figs. 2and 4;, it will be noted that the nozzle, at its extreme end, is madeapproximately Wedge-shaped or reversely beveled, being, as alreadyindicated, provided with tooth-engaging surfaces All that are' slightlyconcave to more closely engage with tooth surfaces.

Fig. 5 illustrates the manner in which the approximately V-shapeddischarge y'oriice ofthe nozzle will approximately align With theinterdental space, so that when the water is discharged, it will besimultaneously forced through the entirely interdental Space withapproximately the same force, thereby insuring the best possible kind ofa cleaning action. Moreover, the bevel formation of the end of thenozzle adapts the nozzle to fit against the teeth and gums closelyenough to insure good pressure for discharging the water through theinterdental spaces.

The nozzle of the syringe is adapted to be made, as above described,entirely of metal, hard rubber or any other suitable material but Ipreferably provide a marginal soft rubber cap detachably fitted to theend ot' the nozzle. This soft rubber cap is indicated as an entirety bythe numeral 12 and is shown detached in Fig. 6. Said cap is pro-v videdwith a marginal flange adapting it to be telescoped over the end of thenozzle and to closely lit the same, and it is provided with a dischargeorifice 13 With branches 13 that correspond to the discharge oriiice inthenozzle. This pliable rubber cap will prevent injury to the gums andwill form a tighter joint between the nozzle, the gums and the teeth,and between the hard or solid ltip of the nozzle.

This improved dental syringe has, in actual dental practice, been foundhighly efficient and extremely desirable for the purposes had in view.As is obvious, it is ot small cost.

What I claim is: Y

l. A dental syringe .having a tubular stem terminating in a nozzleprovided with an approximately V-shaped discharge channel adaptedapproximately to coincide with interdental spaces.v

2. A dental syringe having a tubular stem terminating in a nozzleprovided with an approximately V-shaped discharge channel ada tedapproximately to coincide with inter ental spaces, the end of saidnozzle being made approximately wedge-shaped to afford divergingtooth-engaging surfaces.

opening at the discharge end of said nozzle,-

and operating to simultaneously discharge air between or against teeththe end of said nozzle being formed with slightly concave divergingtooth-engaging surfaces.

5. A dental syringeA having a tubular stem terminating in a nozzleprovided with an vap? proximately V-shaped discharge channel adaptedapproximately to coincide with interdental spaces, and a pliablemarginal rim applied around the end of said nozzle..

6. A dental syringe having a tubular stem terminating in a nozzleprovided With an approximately V-shaped discharge channel adaptedapproximately to coincide with in terdental spaces, and a pliable rubbercap telescoped onto the end of said nozzle and having adischarge'orifice corresponding in form to. the discharge orifice ofsaid nozzle. i 'Y In testimony whereof I aiix my signature.

BENJAMIN F. SAHR.

